BMW:: 5th E28/E34 series:: General information on an auxiliary security system (SRS)

1. Cars of the BMW 5-brand of a series
2. Engine
3. Cooling system
4. Power supply system
5. System of ignition
6. Control systems of the engine and decrease in toxicity of the fulfilled gases
7. System of production of the fulfilled gases
8. Coupling
9. Manual Box of Gear Shifting (MBGS) and automatic transmission (AT)
10. Transmission line
11. Steering and suspension bracket
12. Brake system
13. Body
14. Control body sizes
15. Heater and conditioner of air
16. System of onboard electric equipment
- 16.1. General information
- 16.2. The general information on search of malfunctions in electric chains
- 16.3. Removal and installation of the rechargeable battery
- 16.4. Check of a state and replacement of wires of the battery
- 16.5. General information on safety locks
- 16.6. General information on the relay
- 16.7. General information about system of a charge and precautionary measure during the work with it
- 16.8. Check of system of a charge
- 16.9. Removal and installation of the generator
- 16:10. Replacement of the regulator of tension
- 16:11. Check and replacement of brushes of the generator
- 16:12. General information about system of start of the engine and a precautionary measure
- 16:13. Check of a starter on the car
- 16:14. Removal and installation of a starter
- 16:15. Removal and installation of the traction relay
- 16:16. Check and replacement of breakers of indexes of turn and alarm system
- 16:17. Removal and installation of switches on a steering column
- 16:18. Removal and installation of the lock of ignition
- 16:19. Removal and installation of the radio receiver
- 16:20. Removal and installation of the antenna
- 16:21. Removal and installation of components of an instrument guard
- 16:22. General information on the panel of alarm lamps of a reminder on the term of service (SI)
- 16:23. Replacement of lamps in head headlights
- 16:24. Adjustment of a beam of head headlights
- 16:25. Removal and installation of the case of a head headlight
- 16:26. Replacement of lamps
- 16:27. Removal and installation of the motor of a screen wiper of windshield / glass of a door of a back
- 16:28. Check of work and repair of a heater of back glass
- 16:29. General information on an auxiliary security system (SRS)
- 16:30. Description and check of work of a control system of the speed (tempostat)
- 16:31. Description and check of work of system of the central blocking of doors
- 16:32. Description and check of work of system of power windows
- 16:33. Diagnostics of malfunctions of a suspension bracket of back wheels
17. Routine maintenance of the car
18. Size table and adjusting data
19. Schematic electric circuits
20. Governing bodies and methods of operation
21. System of onboard diagnostics - the principle of functioning and codes of malfunctions

16:29. General information on an auxiliary security system (SRS)

Latest models are equipped with an auxiliary security system (SRS) including the airbag. This system is developed to protect the driver from serious injuries in case of head-on collision. The system consists of the pneumopillow module in the center of a steering wheel, two sensors of blow mounted on panels of forward wings from the inside, and the safety sensor which is in a passenger compartment. Sensors of blow of the SRS system (it is specified by an arrow) are located in a motive compartment - regularly check whether there are no conducting damages.

The module of the airbag includes a casing for a pillow and pump blocks for inflating of a pillow. Assembly of the pump is mounted in a back part of a casing over an opening through which gas arrives, inflating a pillow almost instantly after the system sends an electric signal. This signal is transmitted on a wire which is specially twisted several times that the signal was transmitted irrespective of the provision of a steering wheel.

The SRS system has three sensors: two in front, established on panels of wings from the inside, and the safety sensor located in a passenger compartment. Blow sensors usually react to pressure, closing an electric chain during blow of sufficient force. The electric signal from sensors of blow is sent to the third sensor which then closes a chain and inflates a pneumopillow.

The module containing the safety sensor monitors work of system. It checks work of system every time at inclusion of ignition, forcing to be lit an alarm lamp of AIRBAG (pneumopillow), and then being switched off if the system works normally. If the system is faulty, then the alarm lamp remains included. If the lamp of AIRBAG remains included or if it is lit in operating time of the car, immediately send your car to dealer office of service.